Chemistry HS End of Course Student Name and Date
Baltimore City Public Schools Assessments End of Course High School Chemistry 1 Which of the following statements is 3 Which electron dot diagram NOT TRUE? A. Protons are positively charged sub atomic particles found inside the nucleus of an atom. B. Electrons are negatively charged sub atomic particles found outside the nucleus of an atom. C. Neutrons are neutral particles found outside the nucleus of an atom. represents an atom of chlorine in the ground state? A. B. C I C I D. The fundamental building blocks of atoms are the electrons, protons and the neutrons. C. D. C I C I 2 The charge of a hydrogen (H) atom is F. determined by the number of electrons Hydrogen contains. G. negative since the electron of Hydrogen is found further out from the nucleus. H. positive since the proton of Hydrogen is much heavier than the electron. J. zero since Hydrogen atom contains equal number of electrons and protons. 4 How do the charge and mass of an electron compare to the charge and mass of a proton? F. An electron has the same charge and the same mass as a proton. G. An electron has the same charge, but a smaller mass than a proton. H. An electron has the opposite charge but a smaller mass than a proton. J. An electron has the opposite charge and the same mass as a proton.
Chemistry High School Baltimore City Public Schools Assessments End of Course 5 Of the following statements, which is 8 Aluminum has a total of 13 electrons TRUE about atomic size? and is located in group 3A. Atomic size generally How many valence electrons does one A. remains constant within a period. atom of aluminum have? B. remains constant within a group. F. 3 C. increases from left to right across G. 6 a period. H. 1 D. decreases from left to right across J. 13 a period. 6 Which group of elements should have 9 The non-metals in Groups 15 (5A), 16 (6A), and 17 (7A) similar chemical properties? A. gain electrons when they form ions. F. Li, Be, B, C B. lose electrons when they form ions. G. B, Al, Ga, In C. all form ions with a +1 charge. H. K, Ca, Ga, Ge D. All form ions with a -1 charge. J. Sr, Sc, S, Se 7 Which of the following metals is expected to be the least reactive? A. gold B. potassium C. sodium D. lithium
O O Baltimore City Public Schools Assessments End of Course High School Chemistry 10 Which Lewis electron-dot diagram is 12 The outer structure of the Statue of correct for CO 2? F. x x O x x C x x O Liberty is made of copper metal. Over time, a thin green layer of oxidation called patina forms on the copper surface. When copper oxidized to form this green layer, the copper atoms G. x x x x C x x x x O F. gained protons. G. gained electrons. H. lost electrons. H. x x x x C x x O J. lost protons. J. x x O x x C x O 13 The mass of one mole of H 2 SO 4 ist A. 68 grams. B. 78 grams. C. 98 grams. 11 Fluorine is classified as a group 7A (17) nonmetal. The fluoride ion is most likely expected to have a charge of D. 150 grams. A. +7. B. -1. C. -7. D. +1.
Chemistry High School Baltimore City Public Schools Assessments End of Course 14 Identify the hydrocarbon among the 16 Which of the following would be a following compounds. good electrolyte? 15 F. Li 2 CO 3 G. CHCI 3 H. CO 2 J. NaCl Which of the following will speed up the process of dissolving a sample during an experiment? F. A NaCl solution, because it would conduct electricity well. G. A NaCl solution, because it would conduct electricity poorly. H. Pure water, because it would conduct electricity well. J. Pure water, because it would conduct electricity poorly. A. crushing up the solute B. stirring the solution C. heating up the solution D. all would speed up the process 17 Which subatomic particle is normally found outside the nucleus? A. electron B. neutron C. proton D. photon
Baltimore City Public Schools Assessments End of Course High School Chemistry 18 Which equation represents a double displacement reaction? F. 2HCl + Zn ZnCl 2 + H 2 G. LiOH + HBr LiBr + H 2 O H. H2CO3 H 2 O + CO 2 J. 2NaHCO 3 Na 2 CO 3 + H 2 O + CO 2 20 The following equation is a neutralization reaction. Which compound is the salt? HCl + NaOH NaCl + H 2 O F. HCl G. H 2 O H. NaOH J. NaCl 19 Which of the following compounds is an acid? A. HCI B. KOH C. KCI D. NaCl 21 Temperature tells you A. the total thermal energy in a sample. B. the average kinetic energy in a sample. C. whether a sample is a solid, liquid, or gas. D. the speed at which the particles in a sample are moving.
Chemistry High School Baltimore City Public Schools Assessments End of Course Use the graph below to answer questions 22 23. 1800 Temperature Over Time Temperature (K) 1400 1000 600 200 1 2 3 4 5 6 7 8 9 10 Heating Time (min) 22 In the graph above, what is happening 23 At a heating time of 2 minutes at a heating time of 4 minutes? A. the particles are moving more slowly F. The substance is freezing. than at a heating time of 5 minutes. G. The substance is melting. H. The substance is boiling. J. It is impossible to tell. B. the particles are moving more rapidly than at a heating time of 5 minutes. C. the particles are moving at the same speed than at a heating time of 5 minutes. D. it is impossible to tell.
Baltimore City Public Schools Assessments End of Course High School Chemistry 24 The graph below shows a heatingcooling curve for a substance. During which segment is the substance boiling? 25 The graph below shows a heating curve for a substance. During which segment is the substance changing from a solid to liquid? F F Temperature A B C D E Temperature A B C D Time E Time A. segments DE F. segment AB G. segment BC H. segment DE B. segments BC C. segments AB D. segments EF J. segment EF 26 The pressure inside a pressure cooker is greater than 1 atm. This will cause the boiling temperature of water to be than 100 C, so food will cook than normal. F. lower; faster G. higher; slower H. lower; slower J. higher; faster
Chemistry High School Baltimore City Public Schools Assessments End of Course 27 A chemical reaction is determined 29 Which statement best describes to be endothermic. Which of the the following equation: following is true about this reaction? 2H 2 (g) + O 2 (g) 2H 2 O (l) + energy A. Heat is released during the reaction. B. Heat is absorbed during the reaction. A. A chemical bond is formed and energy is absorbed. C. The reaction can only occur at very low temperatures. B. A chemical bond is formed and energy is released. D. The reaction can only occur at very high temperatures. C. A chemical bond is broken and energy is absorbed. D. A chemical bond is broken and energy is released. 28 Which of the following is an example of an element? F. steel 30 The formula for ammonium sulfate is G. air F. (NH 4 ) 2 SO 4 H. copper G. (NH 4 ) 2 (SO 4 ) 2 J. alcohol H. NH 4 SO 4 J. NH 4 (SO 4 ) 2 31 What is the IUPAC name for the compound FeS? A. Iron (III) sulfate B. Iron (III) sulfide C. Iron (II) sulfide D. Iron (II) sulfate
Baltimore City Public Schools Assessments End of Course High School Chemistry 32 One molecule of carbon dioxide gas contains A. two atoms of carbon and one atom of oxygen. B. one atom of carbon and two atoms of oxygen. C. one atom of carbon and one atom of oxygen. D. two atoms of carbon and two atoms of oxygen. 35 Which of the following balanced equations represents the reaction between magnesium metal and hydrochloric acid to produce aqueous magnesium chloride and hydrogen gas? A. 2MgCl 2 (aq) + H2 (g) Mg (s) + 2HCl (aq) B. 2Mg (s) + HCl (aq) 2MgCl 2 (aq) + H 2 (g) C. Mg (s) + 2HCl (aq) MgCl 2 (aq) + H 2 (g) D. 2Mg (s) + 2HCl (aq) MgCl 2 (aq) + 2H 2 (g) 33 The formula OH represents the A. hydride ion. B. hydroxide ion. 36 What is the word equation for the following formula equation: C 2 H 5 OH + O 2 CO 2 + H 2 O + energy C. hydronium ion. D. oxide ion. F. Carbon dioxide + water ethanol + oxygen + energy G. Ethanol + oxygen carbon dioxide + water + energy 34 Given the unbalanced chemical reaction: FeCl 3 + NaOH Fe(OH) 3 + NaCl H. Ethanol + oxygen + energy carbon dioxide + water J. Ethanol + oxygen + energy carbon dioxide + water + energy The coefficient that should appear in front of the sodium ion is F. one. G. two. H. three. J. four.
Chemistry High School Baltimore City Public Schools Assessments End of Course 37 Change the following equation from a formula equation to a word equation: KOH (aq) + MgCl 2 (aq) KCl (aq) + Mg(OH) 2 (s) A. Potassium added to magnesium yields chloride and hydroxide. B. Potassium hydroxide added to magnesium chloride yields potassium chloride and magnesium hydroxide. 39 A silver nitrate solution is mixed with a potassium bromide solution. The most likely precipitate formed is A. potassium nitrate. B. silver bromide. C. nitrate bromide. D. silver potassium. C. Potassium chloride added to magnesium chloride yields potassium hydroxide and magnesium hydroxide. D. Potassium oxide added to magnesium chloride yields potassium chloride and magnesium oxide. 40 Which type of reaction is represented by the following equation: 2MgO 2Mg + O 2 F. single-displacement G. double-displacement H. synthesis 38 Which process below represents a chemical change? F. crystallization of sugar G. melting of ice H. evaporation of water J. corrosion of copper J. decomposition 41 The desired product for a combustion reactions is A. carbon monoxide. B. oxygen. C. heat energy. D. carbon dioxide. 10
Baltimore City Public Schools Assessments End of Course High School Chemistry 42 Given the following chemical 44 Given the reactants: equation: KClO 3 KCl +O 2. How many KCl ions would be in the balanced equation? 4Fe + 3O 2 2X What would the product be? F. Fe 3 O 2 F. 2 G. 1 H. 4 G. Fe 2 O 3 H. Fe 3 O 4 J. FeO J. 3 43 Given the chemical equation: X + Cl 2 C 2 H 5 Cl + HCl Which molecule is represented by the letter X? A. C 3 H 6 B. C 2 H 6 45 Which of the following represents the balanced equation when methane burns in oxygen producing carbon dioxide and water? A. CO 2 + H 2 O CH 4 + O 2 B. 2 CH 4 + 2 O 2 2 CO 2 + 2 H 2 O C. CH 4 + O 2 CO 2 + H 2 O D. CH 4 + 2 O 2 CO 2 + 2 H 2 O C. C 3 H 8 D. C 2 H 4 11
Chemistry High School Baltimore City Public Schools Assessments End of Course 46 Given the balanced equation representing the reaction: F 2 (g) + H 2 (g) 2HF (g) What is the mole ratio of H 2 (g) to HF (g) in this reaction? F. 2 : 3 G. 1 : 1 H. 1 : 2 J. 2 : 1 49 50 Which of the following is an example of an heterogeneous mixture? A. brass B. vegetable soup C. maple syrup D. salt water An example of a chemical reaction is F. the bending of a nail. 47 Water has a gram molecular mass of 18.0 grams per mole. How many grams of water would be found in 2.50 moles of water? A. 7.20 grams B. 45.0 grams C. 0.139 grams D. 2.50 grams G. the burning of paper. H. the evaporation of water. J. the melting of ice. 48 Which of the following does not influence the rate of a chemical reaction? F. the temperature at which the reaction proceeds G. the concentration of the reactants H. the presence of a catalyst J. the volume of the reaction container 12
Baltimore City Public Schools Assessments End of Course High School Chemistry BCR 1 Write out the steps to show how the following form into a compound a) N +5 and O -2 b) Al +3 and S -2 In your answer be sure to discuss the following: how to use Lewis dot structure to show how the compound is formed determine if the compound is ionic or covalent the method for determining the ending of the elements names the correct prefixes and why they are used how to determine the order of the names Continue on next page» 13
Chemistry High School Baltimore City Public Schools Assessments End of Course 14
Baltimore City Public Schools Assessments End of Course High School Chemistry BCR 2 Describe the structure of an atom of Sulfur ( 32 S 16 ) and give the characteristics of the subatomic particles present. Be sure to include in your answer: the number of each subatomic particle and its charge where each particle is located describe the central portion of the atom in terms of its size compared to the rest of the atom describe the central portion of the atom in terms of its mass relative to the rest of the atom a diagram or drawing of the atom Continue on next page» 15
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Baltimore City Public Schools Assessments End of Course High School Chemistry BCR 3 Write a paragraph about acids and bases. Use complete sentences and write grammatically. Include: a common household example of each taste feel what is the ph of an acid, base, and neutral substance what color is litmus paper in an acid and base? write a balanced reaction of an acid and a base. Continue on next page» 17
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Baltimore City Public Schools Assessments End of Course High School Chemistry BCR 4 Label each change below as a physical (PHYS) or chemical change (CHEM). A. pepper is ground B. two clear liquids are mixed and foam forms C. a solution is poured from a bottle into a flask D. calcium carbonate is powdered in a mortar and pestle E. a metal is burned and forms a grey ash F. sugar is used to create energy for the body G. juice is squeezed from an orange H. gasoline is burned in an engine 19
Chemistry High School Baltimore City Public Schools Assessments End of Course BCR 5 Fill in the blanks for the elements in this chart. For the purposes of this chart, round all atomic masses to the nearest whole number. Element Number of Protons Number of Neutrons Number of Electrons Atomic Mass Atomic Number lithium carbon chlorine silver lead calcium tantalum radium 20
Baltimore City Public Schools Assessments End of Course High School Chemistry BCR 6 Draw a Lewis dot structure for nitrogen trichloride (NCl 3 ). 21
Chemistry High School Baltimore City Public Schools Assessments End of Course BCR 7 Draw a Bohr diagram for aluminum. 22
Baltimore City Public Schools Assessments End of Course High School Chemistry BCR 8 For the following reaction: Mg + Fe 2 O 3 Fe + MgO balance the reaction list the type of reaction give the names for Fe 2 O 3 and MgO, and explain why magnesium would take the place of iron in this reaction 23
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